Scoring knife



N. E. BECK SCORING KNIFE April 17, 1934.

Filed July 12 1952 VENTOR 0 a5fiec% BY Wkfl ATTORNEY WITNESSES wi/za w patented Apr. 17, 1934 SCORING KNIFE Nicholas E. Beck, Floral Park, N. Y.

Application July 12, 1932, Serial No. 622,122

1 Claim.

This invention relates to an improvement in scoring knives which are particularly useful for cutting and fitting border strips, making inlays or otherwise ornamenting linoleum coverings for floors, stairs or the like.

Heretofore it has been the general practice to use a single-bladed knife aided by the use of a straight edge and measuring instruments in order to obtain a parallel scoring of the material. In addition to the time and labor thus involved, considerable difficulty has been encountered, even by the most experienced and skillful workers, in obtaining the best results. It is, therefore, the object of the present invention to provide a scoring implement, by virtue of wh ch accurate paral lel scoring of the material may be expeditiously accomplished by Workers with little or no previous experience.

The invention aims as a further object to provide a scoring knife which includes relatively adjustable parallel blades and a common handle, together with means for holding the blades in relatively adjusted position so as to facilitate the use of the implement.

The invention furthermore contemplates an improvement in scoring knives which embodies but few and simple parts capable of economical production and assemblage but which is strong and durable in construction and highly efficient for the purpose intended.

With the above recited and other objects in v'ew, reference is had to the following description and accompanying drawing, in which there is exhibited one example or embodiment of the invention, while the claim defines the actual scope of the same.

In the drawing:

Figure 1 is a plan View of a scoring knife constructed in accordance with the invention and illustrating the manner in which the same is used.

Figure 2 is a fragmentary side View thereof illustrat ng the knife in use.

Figure 3 is a detail cross sectional View through one of the blades, taken approximately on the line indicated at 33 in Figure 2.

Figure 4 is a fragmentary plan view illustrating another use of the kn fe.

Referring to the drawing by characters of ref erence, A designates generally what will hereinafter be referred to for the purpose of convenience of description as the fixed or stationary blade, and B designates generally the movable or adjustable blade. Each of the blades is of approximately the same shape and While only one movable or adjustable blade is shown, it is to be understood that any number of additional adjustable blades may be employed if desired, within the scope of the invention. Each blade has a main body portion 10 and an angularly disposed terminal 11 which is formed with convergent edges 12 and 13 which intersect and terminate in a point 14, the edge 13 of the terminal 11 being sharp and the other edge 12 being flattened and unsharpened or dull. The body 10 of the fixed or stationary blade A is of slightly greater length, to provide a shank 15 which is anchored to a handle C.

The blades are connected to each other in order to maintain them in parallel relation while permitting of relative adjustment of the blade B with reference to the blade A, and said connection, as illustrated, consists of a pair of parallel studs 16 which, as shown, are anchored at one end at 17 to the fixed blade A and project laterally therefrom. The movable or adjustable blade B is provided with correspondingly located apertures and bosses 18, one located in the body portion 10 of the blade and the other located in the terminal 11. The apertures and bosses of the blade B are designed to receive therethrough the studs 16, whereby the blades are rigidly connected and held in parallel relation while adjustment of. the same toward and away from each other is permitted to vary the spacing of the blades. In order to lock and retain the blades in their adjusted relations, set screws 19 having manipulating heads 20 are threaded radially through the bosses 18 for frictional impingement against the peripheries of the studs 16. Due to this construction and arrangement, the knife or implement may be employed for effecting parallel scoring D on a sheet of linoleum or other material E, whereby a strip F may be obtained which insures accurate parallel edges. It should be further observed that within the range of adjustment illustrated, the construction is such as to insure rigidity of the blades. In addition to employing the knife or implement for the purpose of cutting parallel strips, it Will be observed that in Figure 4, the implement or knife is being employed to obtain an arcuate or circular scoring G of the material E. As previously set forth, the knife or implement may be employed for cutting strips to produce borders or for the making of inlays or otherwise ornamenting linoleum coverings. In using the device, it is moved in the direction indicated by the arrow in Figure 1, so that the cutting edges 13 of the terminals 11 of the blades constitute a leading edge.

While there has been illustrated and described a preferred embodiment of the invention, it is to erally from the body and terminal portions of said fixed blade, an adjustable blade conforming substantially to the size and shape of the fixed blade having apertured bossed portions receiving therethrough the studs and disposing said adjustable blade in parallel relation to the fixed blade for relative movement toward and away from the fixed blade and binding screws extending radially through the bossed portions of the adjustable blade for securing said adjustable blade in adjusted relations to the fixed blade.

NICHOLAS E. BECK. 

